
7.20
CRANKSHAFT POSITION SENSOR (CKP)
GENERAL
The crank position (CKP) sensor is a variable reluctance (VR)
sensor that generates an AC signal by sensing the passing of
the 30 teeth cast into the engine's left side flywheel. Two con-
secutive teeth are missing in the flywheel to establish a refer-
ence point. The CKP sensor sends a signal to the Electronic
Control Module (ECM). This signal is used to reference engine
position (TDC) and engine speed. The CKP sensor is located
near the lower front left corner of the engine crankcase.
NOTE
The crank position sensor cannot be repaired. Replace the
unit if it fails.
REMOVAL
1.
Remove seat.
Disconnect negative (-) battery cable first. If positive (+)
cable should contact ground with negative (-) cable con-
nected, the resulting sparks can cause a battery explosion,
which could result in death or serious injury. (00049a)
2.
Disconnect battery. See
1.4 BATTERY MAINTENANCE
.
3.
Remove the two cable straps securing the CKP wire to
the "V" bracket on the left side of the engine.
4.
Disconnect CKP.
5.
See
Figure 7-77
. Remove screw (2) securing the CKP
wire bracket (3) and sensor (1) to the left crankcase.
Carefully remove CKP sensor (1) and o-ring along with
the harness bracket (3) from engine crankcase.
6.
Remove the plastic clip securing the CKP wire to the har-
ness bracket.
1
2
3
sm02442
1.
Crank position (CKP) sensor
2.
Screw
3.
CKP harness bracket
Figure 7-77. Crank Position (CKP) Sensor
INSTALLATION
NOTE
The CKP sensor o-ring has a blue teflon coating that provides
lubrication during installation. It is not necessary to coat the o-
ring with engine oil or other lubricant to install it.
1.
See
Figure 7-77
. Carefully install CKP sensor (1) and o-
ring into engine crankcase along with the CKP harness
bracket (3).
2.
Apply LOCTITE 272 (red) to screw (2), install and tighten
to 80-100 in-lbs (9.0-11.3 Nm).
3.
Install plastic clip securing the CKP harness onto harness
bracket.
4.
Connect CKP.
5.
Install the two cable straps securing the CKP harness to
the "V" bracket on the left side of the engine.
Connect positive (+) battery cable first. If positive (+) cable
should contact ground with negative (-) cable connected,
the resulting sparks can cause a battery explosion, which
could result in death or serious injury. (00068a)
7-56 2008 XB Service: Electrical
Summary of Contents for XB 2008 Series
Page 1: ...2008 Buell XB Models Service Manual 99490 08YA 2007 Buell Motorcycle Company ...
Page 4: ...Blank Text Here ...
Page 6: ...NOTES ...
Page 22: ...NOTES ...
Page 74: ...1 52 2008 XB Service Maintenance NOTES ...
Page 76: ...NOTES ...
Page 236: ...NOTES ...
Page 273: ...sm00134 Figure 3 47 Valve Spring Compressor 2008 XB Service Engine 3 37 ...
Page 304: ...sm00207 Figure 3 99 Flanged Oil Line 3 68 2008 XB Service Engine ...
Page 332: ...NOTES ...
Page 374: ...NOTES ...
Page 384: ...5 10 2008 XB Service Electric Starter NOTES ...
Page 386: ...NOTES ...
Page 444: ...NOTES ...
Page 460: ...sm00366 Figure 7 16 Boot Gap 7 16 2008 XB Service Electrical ...
Page 528: ...NOTES ...
Page 564: ...A 36 2008 XB Service Appendix A Connector Repair NOTES ...
Page 565: ...SUBJECT PAGE NO B 1 WIRING DIAGRAMS B 1 APPENDIX B WIRING ...
Page 566: ...NOTES ...
Page 572: ...Figure B 2 Figure B 2 Main Harness Ulysses and Lightning Main Harness Ulysses and Lightning ...
Page 574: ...Figure B 3 Figure B 3 Main Harness Firebolt Main Harness Firebolt ...
Page 580: ...Figure B 6 Figure B 6 Lighting Circuit Firebolt Lighting Circuit Firebolt ...
Page 588: ...Figure B 10 Figure B 10 Starting Circuit Firebolt Starting Circuit Firebolt ...
Page 590: ...Figure B 11 Figure B 11 Charging Circuits All Models Charging Circuits All Models ...
Page 592: ...Figure B 12 Figure B 12 Heated Hand Grips Ulysses Heated Hand Grips Ulysses ...
Page 594: ...NOTES ...
Page 598: ...C 4 2008 XB Service Appendix C Conversions NOTES ...
Page 599: ...SUBJECT PAGE NO D 1 APPENDIX D HOSE AND WIRE ROUTING D 1 APPENDIX D HOSE AND WIRE ROUTING ...
Page 600: ...NOTES ...
Page 638: ...D 38 2008 XB Service Appendix D Hose and Wire Routing NOTES ...
Page 640: ...NOTES ...
Page 646: ...E 6 2008 XB Service Appendix E Active Intake Japanese Models NOTES ...
Page 647: ...SUBJECT PAGE NO F 1 GLOSSARY F 1 APPENDIX F GLOSSARY ...
Page 648: ...NOTES ...
Page 652: ...F 4 2008 XB Service Appendix F Glossary NOTES ...
Page 678: ...XXVI TORQUE VALUES NOTES ...
Page 687: ......
Page 688: ......